could marbleise
Regular verb: marbleise - marbleised- marbleised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could marbleise
you could marbleise
she could marbleise
we could marbleise
you could marbleise
they could marbleise 	I could be marbleising
you could be marbleising
she could be marbleising
we could be marbleising
you could be marbleising
they could be marbleising	I could have marbleised
you could have marbleised
she could have marbleised
we could have marbleised
you could have marbleised
they could have marbleised	I could have been marbleising
you could have been marbleising
she could have been marbleising
we could have been marbleising
you could have been marbleising
they could have been marbleising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't marbleise
you couldn't marbleise
she couldn't marbleise
we couldn't marbleise
you couldn't marbleise
they couldn't marbleise 	I couldn't be marbleising
you couldn't be marbleising
she couldn't be marbleising
we couldn't be marbleising
you couldn't be marbleising
they couldn't be marbleising	I couldn't have marbleised
you couldn't have marbleised
she couldn't have marbleised
we couldn't have marbleised
you couldn't have marbleised
they couldn't have marbleised	I couldn't have been marbleising
you couldn't have been marbleising
she couldn't have been marbleising
we couldn't have been marbleising
you couldn't have been marbleising
they couldn't have been marbleising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I marbleise?
could you marbleise?
could she marbleise?
could we marbleise?
could you marbleise?
could they marbleise? 	could I be marbleising?
could you be marbleising?
could she be marbleising?
could we be marbleising?
could you be marbleising?
could they be marbleising? 	could I have marbleised?
could you have marbleised?
could she have marbleised?
could we have marbleised?
could you have marbleised?
could they have marbleised? 	could I have been marbleising?
could you have been marbleising?
could she have been marbleising?
could we have been marbleising?
could you have been marbleising?
could they have been marbleising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I marbleise?
couldn't you marbleise?
couldn't she marbleise?
couldn't we marbleise?
couldn't you marbleise?
couldn't they marbleise? 	couldn't I be marbleising?
couldn't you be marbleising?
couldn't she be marbleising?
couldn't we be marbleising?
couldn't you be marbleising?
couldn't they be marbleising? 	couldn't I have marbleised?
couldn't you have marbleised?
couldn't she have marbleised?
couldn't we have marbleised?
couldn't you have marbleised?
couldn't they have marbleised? 	couldn't I have been marbleising?
couldn't you have been marbleising?
couldn't she have been marbleising?
couldn't we have been marbleising?
couldn't you have been marbleising?
couldn't they have been marbleising?